Warm Tips: Please DONT use the USB cable to the power supply the car DVR. Otherwise, it could not power on. Please use our standard car charger to the power supply the car DVR when you receive the package. Before order, please kindly check whether your local 4G SIM card bands is LTE: FDD,2100(B1)/1800(B3). If not, then the 4G function doesnt work. This device doesnt support hardware anti-radar, but you could install the anti-radar application (e.g. Antiradar Strelka android apps from google play ) into this car DVR for using.